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发布者:微桥 发布时间:2010-4-21 阅读:5948次    关键字: PT6103
PT6103 具有热调节和电池过热保护功能的线性锂电池充电管理芯片


PT6103-Standalone Linear Li-Ion Battery Charger with Thermal Regulation and Battery Thermal Protection PDF文档下载

GENERAL DESCRIPTION
    The PT6103 is a highly integrated Li-ion battery linear charging management device targeted at space limited portable applications. The PT6103 offers an integrated MOSFET and current sensor, reverse blocking protection, high accuracy current and voltage regulation, charge status indication, and charge termination in  SOT23,DFN6,DFN8 or ESOP8 package. The PT6103 charges a battery in three phases: trickle charging, constant current and constant voltage. No blocking diode is required due to the internal MOSFET architecture. The thermal feedback regulates the charging current to limit the chip temperature during high power operation or high ambient temperature to maximize the charge rate without risk of overheating . The charge voltage is fixed at 4.2V, and the charge current can be programmed externally with a single resistor. The PT6103 automatically terminates the charge cycle when the charge current drops to 1/10 the programmed value after the final float voltage is reached. Once the temperature outside the normal range thresholds is detected the PT6103 immediately stops  the charging and CHG pin output 10Hz square wave. And charging is stopped until restart the chip again. And when the TS pin is floating or connected to ground, the battery temperature protection is disabled.

FEATURES
  Charges Single Cell Li-Ion Batteries Directly from USB Port
  Programmable Charge Current Up to 800mA
  No MOSFET, Sense Resistor or Blocking Diode Required
  Complete Linear Charger in SOT23-6, DFN6, DFN8 or ESOP8 Package for Single Cell Lithium-Ion Batteries
  Battery Thermal Protection
  Constant-Current/Constant-Voltage Operation with Thermal Regulation to Maximize Charge Rate   Without Risk of Overheating
  Preset 4.2V Charge Voltage with ±1% Accuracy

APPLICATIONS
  Cellular Telephones, PDAs, MP3 Players
  Bluetooth Applications
  Digital Cameras
  Charging Docks and Cradles

TYPICAL APPLICATION CIRCUIT

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